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signal: make get_signal() return bool 

make get_signal() already behaves like a boolean function.  Let's actually
declare it as such too.

Link: http://lkml.kernel.org/r/20180602103653.18181-18-christian@brauner.io
Signed-off-by: Christian Brauner <christian@brauner.io>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Morris <james.morris@microsoft.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christian Brauner 2018-08-21 22:00:54 -07:00 committed by Linus Torvalds
parent f99e9d8c5c
commit 20ab7218d2
2 changed files with 3 additions and 3 deletions
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2
include/linux/signal.h
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@ -265,7 +265,7 @@ extern void set_current_blocked(sigset_t *);
extern void __set_current_blocked(const sigset_t *); extern void __set_current_blocked(const sigset_t *);
extern int show_unhandled_signals; extern int show_unhandled_signals;
extern int get_signal(struct ksignal *ksig); extern bool get_signal(struct ksignal *ksig);
extern void signal_setup_done(int failed, struct ksignal *ksig, int stepping); extern void signal_setup_done(int failed, struct ksignal *ksig, int stepping);
extern void exit_signals(struct task_struct *tsk); extern void exit_signals(struct task_struct *tsk);
extern void kernel_sigaction(int, __sighandler_t); extern void kernel_sigaction(int, __sighandler_t);

4
kernel/signal.c
View File

@ -2287,7 +2287,7 @@ static int ptrace_signal(int signr, siginfo_t *info)
return signr; return signr;
} }
int get_signal(struct ksignal *ksig) bool get_signal(struct ksignal *ksig)
{ {
struct sighand_struct *sighand = current->sighand; struct sighand_struct *sighand = current->sighand;
struct signal_struct *signal = current->signal; struct signal_struct *signal = current->signal;
@ -2297,7 +2297,7 @@ int get_signal(struct ksignal *ksig)
task_work_run(); task_work_run();
if (unlikely(uprobe_deny_signal())) if (unlikely(uprobe_deny_signal()))
return 0; return false;
/* /*
* Do this once, we can't return to user-mode if freezing() == T. * Do this once, we can't return to user-mode if freezing() == T.